-- @testpoint: opengauss关键字constraint_catalog(非保留)，作为函数名，部分测试点合理报错

--关键字不带引号-成功
drop function if exists constraint_catalog;
create function constraint_catalog(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带双引号-成功
drop function if exists "constraint_catalog";
create function "constraint_catalog"(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带单引号-合理报错
drop function if exists 'constraint_catalog';
create function 'constraint_catalog'(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带反引号-合理报错
drop function if exists `constraint_catalog`;
create function `constraint_catalog`(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--清理环境
drop function if exists constraint_catalog;
drop function if exists "constraint_catalog";